[tex]dane:\\v_{o} = 0\\t = 5 \ s\\v = 15\frac{m}{s}\\szukane:\\a = ?\\s = ?[/tex]
[tex]a = \frac{\Delta v}{t} = \frac{v-v_{o}}{t} = \frac{v}{t}\\\\a = \frac{15\frac{m}{s}}{5 \ s} = 3\frac{m}{s^{2}}\\\\\\s = \frac{1}{2}at^{2}\\\\s = \frac{1}{2}\cdot3\frac{m}{s^{2}}\cdot(5 \ s)^{2} = 37,5 \ m[/tex]